Banquet Chairs Size: 450W*520D*930H(mm) Metal Frame Size:20mmx20mm square steel tube with paint coating finish, the thicknessof the tube is 1.2mm Aluminium Frame Size: 450W*520D*930H(mm)25mmx25mm square aluminum tube with paint coating finish,the thickness of the tube is 1.8mm Flat Molded seat with high density Availabe in Metal and Aluminium frame.